Wedge or splitting-tool for coal-mining or other purposes.



No. 735,520. PATENTED AUG. 4, 1903. A. IVANOFP. WEDGE 0R SPLITTING TOOLFOR GOAL MINING OR OTHER PURPOSES.

APPLICATION FILED JULY 8, 1902.

N0 MODEL.

U ITED STATES Patented August 4, 1903.

PATENT OFFICE.

WEDGE OR SPLITTING-TOOL FOR COAL-MINING OR OTHER PURPOSES.

SPECIFICATION forming part of Letters Patent No. 735,520, dated August4, 1903. Application filed July 8, 1902. Serial No. 114,837. (No model.)

To all whom, it may concern.-

Be it known that I, ALEXANDRE IvANoFF, engineer, a subject of the Czarof Russia, residingat Oharkoff, Russia, have invented a new and usefulWedge or Splitting-Toolfor Ooal-MiningorotherPurposes; andldoherebydeclare the following to be a full, clear, and exact description of thesame.

The present invention relates to improvements in or relating to wedgesor splittingtools for coal-minim g and other purposes; and it consistsof a screw-actuated wedge or splitting-tool which is introduced into ahole made in the block to be broken and opened out'or expanded byturning the screw portion. By this means the inconveniences of themethods used hitherto are avoided. Thus the splitting by means of awedge introduced into a hole bored in a coal-vein and driven in byhammering produces a great amount of dust and small particles. Theexplosion of dynamite certainly allows larger blocks to be obtained, butthe net cost'is considerably higher. Moreover, this method cannot beused in fire-damp mines and places. In order to overcome thesedrawbacks, the present apparatus has been devised, which allows of largeblocks being obtained at small expense, while at the same time lessexperienced workmen are needed.

The following is a description of the apparatus, represented in Figure 1in longitudinal section, Fig. 2 being a section on the line A B of Fig.1, and Fig. 3 a section on the line C D of Fig. 2. I

A cylinder 0. at, having a hollow end space I) b, contracting toward theouter end of the cylinder, is split longitudinally. The two parts a, aof the cylinder are driven apart by a wedge or plunger 0, movable in thespace 6' and actuated by a screw d, turning in a threaded nut portion f,fixed by being set in a socket f in the cylinder and alsoby pins .g,projecting through holes g in said cylinder at or toward the rear end ofthe cylinder at a. The screw terminates at its outer end in a squarehead Z, on which is arranged a lever-arm, handle, or wheel in.

The working of the device is easily understood. A channel about a meterin depth is made in the coal-vein or material to be split or brokendown. Then several holes of about eighty-five millimeters in diameterand five hundred and-fifty millimeters in depth are bored, into whichthe apparatus is successively introduced. The workman by operating onthe arm 11; causes the wedge to ad- Vance, and" the spreading apart ofthe two parts of the cylinder a caused thereby forces the coal or othermaterial to split up into large blocks.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. The combination of a split part formed with aninternal socket, a wedge arranged in said split part and adapted tospread the members thereof, a screw controlling said wedge, and anon-rotative threaded part penetrated andengaged by said screw, saidpart being inclosed in said socket and thereby secured in said splitpart against movement longitudinally of the latter, substantially asdescribed.

In testimony whereof I have signed this specification in the presenceoftwo subscribing witnesses.

ALEXANDRE IVANOFF.

Witnesses:

H. A. LOVIAGUINE, E. Looms.

